import lombok.Builder;
import lombok.ToString;

/**
 * @author zxs
 * @since 2020/05/14
 */
@ToString
public abstract class Pizza2 {

    private String a;
    private String b;

}

@ToString
@Builder
class Pizza2A extends Pizza2{

    private String c;


}

@ToString
@Builder
class Pizza2B extends Pizza2{

    private String d;


}
